Starship Asterisk*

Black Holes? They Are Like a Hologram International School of Advanced Studies (SISSA) | 2020 Jun 03 Spherical, smooth and simple according to the theory of relativity, or extremely complex and full of information as, according to quantum laws, Stephen Hawking used to say? There is no single answer...

Here's a question about the JWST. So, it's in a halo orbit around L2 and this incredible telescope stays on the far side of its sunshield. How much range of movement does it have for pointing? I guess that scheduling observation of a given target in deep space is restricted to certain times of year...

Fred the Cat wrote: ↑Sat Feb 05, 2022 4:18 pm
Geck - There must be a space cowboy nearby.

You don't see the cowboy under the hat

<<Moonfall is a 2022 science fiction disaster film co-written, directed, and co-produced by Roland Emmerich. The film was shot in Montreal on a $146 million production budget, making it one of the most expensive independently produced films of all-time. Moonfall was released in the United States on...

https://upload.wikimedia.org/wikipedia/commons/b/b3/SgrAWest_BEAR.jpg I struggle to fit the two pictures. The posted 2° wide MeerKAT image is 200 times wider and Sgr A spot in that panorama is too bright anyhow to see any details. It certainly doesn't help that the :arrow: "Surface brightness ...

orin stepanek wrote: ↑Fri Feb 04, 2022 12:27 pm

I do have trouble finding Callisto! OK; I found it!

https://www.sarao.ac.za/wp-content/uploads/2022/01/03_MeerKAT_GC_SgrA_and_Bubble-1500x844.jpg If you ask me, a supernova remnant that appears to be located close to the center of our galaxy - so that it can be clearly seen in an infrared, radio or X-ray image that portrays the center of our galaxy ...

In these two images, though both Venus and the Moon are nominally illuminated in the same percentage of their Earth-facing hemispheres, the cusps of Venus appear to extend further toward the north and south extremes than those of Luna do. This is not an illusion. Venus has an upper layer of thin cl...

https://upload.wikimedia.org/wikipedia/commons/a/a0/CardThisIsTheLife.jpg Quite hypnotic to watch. Really let's you appreciate the libration and size fluctuations. What a complex pas de deux the Earth and Moon have! Though in this case, both are female: Mother Earth and her daughter Selene/Luna! A ...

Interesting that the sun goes into a 11 year cycle! Does this show the stability of the Sun?⁉️ If you're really looking at the underlying theory (including its relevance to solar stability) you need to consider that it's actually a 22 year cycle. The 11-year cycle is actually a half cycle, as the S...

As the grand structure of the universe goes, what would be the order of things? Cosmic background radiation>filaments and voids>super clusters>clusters>local group>Milky Way>solar system. It’s hard to organize these in my mind at the scale they are represented. You kind of went from generic to spec...

In case anyone is interested, when I first published this data back in early December I created a Lambert equal area cylindrical projection of the image featured in today's APOD. Shown below is a cropped portion of this projection, showing the regions referenced in the posts above. The main mare ba...

So... it was clear to you both from the Hubble image alone that this was never a Bok globule (and, presumably, that Herschel PACS far-IR 70 & 160mum maps, APEX LABOCA & SABOCA submillimeter continuum maps, and Magellan PANIC near-IR images were a waste of time) :?: It was clear to me. And i...

With Ann and Peterson sparing, one can only conclude that this discussion is one for the ages. But we're not. We're in agreement. Indeed.... for you wrote: I'm mainly responding to her claim "It is so clear from the Hubble image that NGC 1999 is a cavity." I guess that is subject to inter...

With Ann and Peterson sparing, one can only conclude that this discussion is one for the ages. spare (v.) Old English sparian "to refrain from harming, be indulgent to, allow to go free; use sparingly," from the source of Old English spær "sparing, frugal," from Proto-Germanic *...

What caused the Square corners? What square corners? https://upload.wikimedia.org/wikipedia/commons/0/08/Lacus-autumni-clem1.jpg https://upload.wikimedia.org/wikipedia/commons/c/cb/Triple-Goddess-Waxing-Full-Waning-Symbol.svg <<Lacus Autumni (Latin autumnī, "Lake of Autumn") is a region o...

wolfie138 wrote: ↑Thu Jan 27, 2022 9:29 pm
https://www.bbc.co.uk/news/world-australia-60150542

• https://en.wikipedia.org/wiki/Tasmanian ... ney_Tunes)

Ann was misled by the caption of the Wikipedia image in Wikimedia Commons that, as it should, cites the original HHT caption? The text on the Wikipedia, on the other hand, was corrected to refer to a hole on 16 May 2010, according to the page edit history. And Chris perhaps did not notice that Ann ...

https://www.youtube.com/watch?v=rQ-uzCC3hjQ Ann was misled by the caption of the Wikipedia image in Wikimedia Commons that, as it should, cites the original HHT caption? The text on the Wikipedia, on the other hand, was corrected to refer to a hole on 16 May 2010, according to the page edit history...

It is so clear from the Hubble image that NGC 1999 is a cavity. The incredible void in it makes it a unique object, at least among objects so far catalogued by astronomers. Imagine the jet that punched through the rather thick nebula here and left this T-shaped scar! This "black hole", or...

1) The yellow Antares reflection nebula. Antares is, despite being called a red supergiant, not actually a red star. Its B-V index is around +1.9, which makes it a yellow-orange star. (If you want a redder star, check out Mu Cephei , with a B-V index of cirka +2.2, or, better yet, carbon star T Lyr...